/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundLiteralNode.h
If the data type is executable, we treat it as a reference since it is non-const.
static constexpr [EVertexAccessType](API\Plugins\MetasoundGraphCore\Metasound__EVertexAccessType) AccessType = (bIsExecutableDataType || bIsPostExecutableDataType) ? EVertexAccessType::Reference : EVertexAccessType::Value;